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Characterization the microstructure and defects of matrix graphite irradiated with Xe ions
Xu, HX; Lin, J; Li, JJ; Zhu, ZY; Zeng, GL; Liu, JD; Gu, BC; Liu, B
2017
Source PublicationNUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
ISSN0168-583X
Volume406Issue:-Pages:638-642
Subtype期刊论文
AbstractThe matrix graphite of pebble fuel elements was irradiated with 1 MeV Xe ions at room temperature to fluences of 5.8 x 10(14) ions/cm(2) and 2.9 x 10(15) ions/cm(2), respectively. The microstructure and defects of matrix graphite samples were characterized by using scanning electron microscopy (SEM), Raman spectroscopy and slow positron beam techniques. The SEM result reveals that hundred-nanometer sized pores appear at the surface after irradiation and the density of pore increases with fluence. Raman results show that D peak (1350 cm(-1)) and G peak (1580 cm(-1)) are broadened after irradiation. In addition, the G peak position shifts from 1580 cm(-1) to 1560 cm(-1) with the linewidth increases from 21 cm(-1) to 132 cm(-1), corresponding to the increase in bond-angle disorder as the matrix graphite transforms from microcrystalline to amorphous carbon(a-C). The slow positron beam study shows that the defects trapped positron S parameter increases with fluence, suggesting that the vacancy-type defects concentration or size of open volume defects increases. The analysis of Raman and slow positron beam consistently conclude that the reason for the phase transition after irradiation is the increase in irradiation-induced vacancy defects accompanied by the overlap of disordered regions. (C) 2017 Elsevier B.V. All rights reserved.
KeywordNeutron-irradiation Carbon Beam
DOI10.1016/j.nimb.2017.03.159
Indexed BySCI
WOS KeywordNEUTRON-IRRADIATION ; CARBON ; BEAM
Language英语
WOS IDWOS:000407659500045
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28575
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Xu, HX,Lin, J,Li, JJ,et al. Characterization the microstructure and defects of matrix graphite irradiated with Xe ions[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,2017,406(-):638-642.
APA Xu, HX.,Lin, J.,Li, JJ.,Zhu, ZY.,Zeng, GL.,...&Liu, B.(2017).Characterization the microstructure and defects of matrix graphite irradiated with Xe ions.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,406(-),638-642.
MLA Xu, HX,et al."Characterization the microstructure and defects of matrix graphite irradiated with Xe ions".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 406.-(2017):638-642.
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